CVE-2020-24659
moderate-risk
Published 2020-09-04
An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with unexpected timing, and then an invalid second handshake occurs. The crash happens in the application's error handling path, where the gnutls_deinit function is called after detecting a handshake failure.
Do I need to act?
~
3.6% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10
High
NETWORK
/ LOW complexity
Affected Vendors
References (18)
Third Party Advisory
https://security.gentoo.org/glsa/202009-01
Third Party Advisory
https://security.netapp.com/advisory/ntap-20200911-0006/
Third Party Advisory
https://usn.ubuntu.com/4491-1/
Vendor Advisory
https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-09-04
Third Party Advisory
https://security.gentoo.org/glsa/202009-01
Third Party Advisory
https://security.netapp.com/advisory/ntap-20200911-0006/
Third Party Advisory
https://usn.ubuntu.com/4491-1/
Vendor Advisory
https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-09-04
46
/ 100
moderate-risk
Severity
26/34 · High
Exploitability
7/34 · Low
Exposure
13/34 · Low